'use strict'
const path = require('path')
const defaultSettings = require('./src/settings.js')
// const ThreeExamples = require('three')

function resolve(dir) {
  return path.join(__dirname, dir)
}

const name = defaultSettings.title || 'vue2-three.js' // page title
const ENV = process.env.NODE_ENV
const mockData = ENV === 'development' ? require('./mock/mock-server.js') : null
const port = 8081 // dev port

// All configuration item explanations can be find in https://cli.vuejs.org/config/
module.exports = {
  /**
   * You will need to set publicPath if you plan to deploy your site under a sub path,
   * for example GitHub Pages. If you plan to deploy your site to https://foo.github.io/bar/,
   * then publicPath should be set to "/bar/".
   * In most cases please use '/' !!!
   * Detail: https://cli.vuejs.org/config/#publicpath
   */
  publicPath: './',
  outputDir: 'dist',
  assetsDir: 'static',
  lintOnSave: false,
  productionSourceMap: false,
  devServer: {
    port: port,
    overlay: {
      warnings: false,
      errors: true
    },
    before: mockData
  },
  // plugins: [
  //   // 设置环境变量信息
  //   new webpack.DefinePlugin({
  //     VERSION: JSON.stringify('5fa3b9'),
  //     'process.env': {
  //       NODE_ENV: JSON.stringify(process.env.NODE_ENV)
  //     }
  //   })
  // ],
  /*   pluginOptions: {
    ...ThreeExamples
  }, */
  configureWebpack(config) {
    config.name = name
    config.entry = ['babel-polyfill', './src/main.js']
  },
  chainWebpack(config) {
    config.module
      .rule('md')
      .test(/\.md/)
      .use('vue-loader')
      .loader('vue-loader')
      .end()
      .use('vue-markdown-loader')
      .loader('vue-markdown-loader/lib/markdown-compiler')
      .options({
        raw: true
      })

    config.resolve.alias
      .set('@common', resolve('src/common'))
      .set('@assets', resolve('src/assets'))
      .set('@components', resolve('src/components'))
      .set('@', resolve('src'))
    // it can improve the speed of the first screen, it is recommended to turn on preload
    config.plugin('preload').tap(() => [
      {
        rel: 'preload',
        // to ignore runtime.js
        fileBlacklist: [/\.map$/, /hot-update\.js$/, /runtime\..*\.js$/],
        include: 'initial'
      }
    ])

    // when there are many pages, it will cause too many meaningless requests
    config.plugins.delete('prefetch')

    config.when((config) => {
      config
        .plugin('ScriptExtHtmlWebpackPlugin')
        .after('html')
        .use('script-ext-html-webpack-plugin', [
          {
            // `runtime` must same as runtimeChunk name. default is `runtime`
            inline: /runtime\..*\.js$/
          }
        ])
        .end()
      config.optimization.splitChunks({
        chunks: 'all',
        cacheGroups: {
          libs: {
            name: 'chunk-libs',
            test: /[\\/]node_modules[\\/]/,
            priority: 10,
            chunks: 'initial' // only package third parties that are initially dependent
          },
          elementUI: {
            name: 'chunk-elementUI', // split elementUI into a single package
            priority: 20, // the weight needs to be larger than libs and app or it will be packaged into libs or app
            test: /[\\/]node_modules[\\/]_?element-ui(.*)/ // in order to adapt to cnpm
          },
          commons: {
            name: 'chunk-commons',
            test: resolve('src/components'), // can customize your rules
            minChunks: 3, //  minimum common number
            priority: 5,
            reuseExistingChunk: true
          }
        }
      })
      // https:// webpack.js.org/configuration/optimization/#optimizationruntimechunk
      config.optimization.runtimeChunk('single')
    })
  }
}
